Alisa og Claus Clausen on thu 15 mar 01
Color test for WoDo White, cone 6, oxidation.
Tested on light, iron flecked, mid-range stoneware, fired to 1215c, soak =
30 minutes, oxidation.
Base Receipe, adapted from Tony Martens ToDo white.
50 Neph. Syenite
20 Ball Clay
All tests resulted in a matt glaze with a waxy feel. Stable and iron =
flecks showed clearly through. Oxides are in precents to 100 gram =
batches of base.
1 Cobalt oxide
2 Cobalt oxide
1 Cobalt oxide, 5 Rutile
Mottle medium green with light brown throughout.
2 Cobalt oxide, 5 Rutile
This glaze test is matt, but it sparkles. Color is same as abouve but =
slightly more fluid and a small amount of streaking.
1 Cobalt oxide, 1 Tin oxide
Greyish blue to toast brown base with some higher white areas.
2 Cobalt oxide, 1 Tin oxide
Light brown ground with high spots of lilac and grey blue edges.
1 Cobalt oxide, 5 Tin oxide
Light grey to blue ground with lilac streaking where thickest.
2 Cobalt, 5 Tin oxide
1 Cobalt oxide, 10 Zircon
Matt, matt, matt light lilac with light blue streaking where thickest.
2 Colbalt oxide, 10 Zircon
Very close to above with a more greyish blue ground under lilac where =
1 Cobalt oxide, 1 tin oxide, 5 Rutile
This was matt, but fluid. Contradiciton? Toasty brown ground with =
streaking greys and lilacs throughout.
1 Copper oxide, 1 Cobalt oxide
Pale pink/lilac with some darker lilac where thickest.
1 Copper oxide, 1 Cobalt oxide, 5 rutile
Greenish where thickest, browner where thinner. Some lilac nuances =
I am satisfied on a coloring and surface basis with these tests. Since =
I am mostly to matts and semi matts, these tests provided colors and =
surface that I personally like. The greens were of particular interest =
and the lilacs are very pallatable in small doses.
The overall feel of this glaze is very smooth and waxy. This is a =
Dolomite base I adapted to use with Wollastonite instead of Whiting. =
The substitution proves to be a very covering, good to feel glaze. =20
It should be noted that I use the word "stable" to mean stayed where I =
put the glaze. I would like to hear from Glaze gurus if this base is =
stable according to your criterias for a stable (OK to use) glaze. Any =
improvements would be appreciated because I like the surface texture of =
this glaze very much.
Alisa in Denmark